"What crawled up your ass?" an offended friend asks Clint Eastwood in his new movie, "Trouble With the Curve." "Old age," rasps the screen legend.

Yes, Clint has made a career of playing men who'd just as soon shoot you as look at you. But now, he's mostly shooting dirty looks and insults -- and he isn't the only one. Eastwood has joined a pantheon of classic actors and aging action heroes who enjoy playing crusty old coots on screen as they've gotten older. (Look for the grouchy gangster fest...